We look at the division of 815691 by 80 
We want to figure out the number of times 815691 can be divided by 80.

Going ahead to step 1:
The number 80 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 80

Step 2:
If we divide 81 by 80, we get 1 and a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 80 from 81, we get 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 80

Moving on to step 3:
If we divide 15 by 80, we get 0 and a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtract 0 from 15 to get 15.
Take the next digit (6) from the dividend and append it to 15, then repeat: 156 / 80

Step 4:
80 can be fit into 156 1 times, resulting in a remainder of 76.
Use 1 as the next digit of our solution. 
Result so far: 101.0
The remainder is 76 after subtracting 80 from 156.
Take the next digit (9) from the dividend and append it to 76, then repeat: 769 / 80

Moving on to step 5:
769 divided by 80 is 9 with a remainder of 49.
Record the quotient 9 as the next digit in the result. 
Result so far: 1019.0
If we take 720 away from 769, we end up with 49.
Bring next digit (1) of the dividend behind the 49 and repeat the process: 491 / 80

Step 6:
If we divide 491 by 80, we get 6 and a remainder of 11.
The next digit of our result is 6. 
Result so far: 10196.0
If we subtract 480 from 491, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
The number 80 fits into 110 1 times, leaving a remainder of 30.
Use 1 as the next digit of our solution. 
Result so far: 10196.1
Deduct 80 from 110 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
When dividing 300 by 80, we get 3 with a remainder of 60.
Write down 3 as next digit of the result. 
Result so far: 10196.13
Deduct 240 from 300 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 9:
When dividing 600 by 80, we get 7 with a remainder of 40.
The number 7 becomes the next digit in our result. 
Result so far: 10196.137
Subtracting 560 from 600 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 10:
80 goes into 400 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 10196.1375
Deduct 400 from 400 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 11:
80 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 10196.1375
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 12:
If we divide 0 by 80, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 10196.1375
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 10196.1375 with a remaining 0.0.